Method for extracting and refining anthocyanin in black rice

A technology of extraction method and purification method, applied in chemical instruments and methods, preparation of sugar derivatives, antidote and other directions, can solve the problems of backward production technology of black rice anthocyanins, unfavorable large-scale production, low product purity, etc. Coronary heart disease incidence, improved visual acuity, and improved product purity

Inactive Publication Date: 2012-09-12
魏有良
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] At present, the production technology of black rice anthocyanins is backward, the cost is high, and the product purity is low. The patents involved include CN200510049274.0, CN200310104856.5, CN200710056592.9, and CN200910132402.6. These patents all use ethanol extraction, which is costly and consumes energy. When using solvent separation and purification technology, there are many processes, which is not conducive to the needs of large-scale production

Method used

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  • Method for extracting and refining anthocyanin in black rice
  • Method for extracting and refining anthocyanin in black rice

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Experimental program
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Embodiment approach

[0029] The embodiment of the present invention comprises the following steps:

[0030] (1) Black rice and brown rice or black rice and brown rice bran are added with an acid-containing aqueous solution for heat preservation and extraction, filtered to obtain an extract, and the extract and raw materials are retained; the extraction process can be repeated 2-5 times. The acid used for extraction is an inorganic acid or an organic acid, which can be one or more mixtures of hydrochloric acid, sulfuric acid, phosphoric acid, acetic acid, citric acid, gallic acid, tartaric acid, propionic acid, butyric acid, valeric acid or oxalic acid. The extraction temperature is 30-70°C.

[0031] (2) The water extract is adsorbed by a macroporous adsorption resin; after washing with water, the macroporous adsorption resin is a non-polar or weakly polar resin, specifically D101, D201, AB-8, XAD-6, XAD Any of -7, XAD-10, MD21, LD-305.

[0032] (3) After the macroporous adsorption resin is washe...

example 1

[0037] Example 1: Take 1kg of black rice and brown rice, add 6 times the amount of acid water (hydrochloric acid to adjust the pH to 1.5-1.8), keep warm at 45-50°C for 1 hour, filter, add 2 times the amount of acid water to rice dregs, and keep warm at 45-50°C After 30 minutes, filter, combine the two extracts, pass through D101 macroporous adsorption resin column, wash with deionized water until the color of the effluent is light, then analyze with 10-80% ethanol, and concentrate the solution under reduced pressure to a relative density of 1.0-1.2 , spray-dried at 180°C to obtain 10.3g of anthocyanins, the yield was 1.03% of the weight of the raw material, and the anthocyanin content was 32.2%.

example 2

[0038] Example 2: Take 1kg of black rice and brown rice, add 8 times the amount of acid water (adjust pH 1.8-2.2 with sulfuric acid), keep warm at 60°C for 1 hour, filter, add 2 times the amount of acid water to the rice dregs, keep warm at 60°C for 1 hour, and filter , combine the two extracts, pass through the XAD-7 macroporous adsorption resin column, wash with pure water until the color of the effluent is light, then analyze with 10-80% ethanol, concentrate the analysis solution under reduced pressure to a relative density of 1.0-1.2, 150°C Spray-dried to obtain 9.7 g of anthocyanins, the yield rate was 0.97% of the raw material weight, and the anthocyanin content was 26.7%.

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Abstract

The invention relates to a process for extracting and refining anthocyanin in coarse rice, rice bran of black rice. According to the technical scheme, the process comprises the following steps of: extracting raw materials by using an acidic aqueous solution under the condition of keeping temperature, filtering, mixing extracting solutions, adsorbing by macroporous adsorbent resin, washing the resin by using water, desorbing by using an alcohol aqueous solution with appropriate concentration, concentrating a desorbed solution until the relative density is 1.1 to 1.2, and performing spray drying or vacuum drying to obtain an anthocyanin extract, wherein the content of the anthocyanin is more than 25 percent.

Description

technical field [0001] The invention relates to a method for extracting and refining anthocyanin components in brown rice grains of black rice. The product can be used as a raw material in food, skin care products and medicine or as an additive. technical background [0002] Anthocyanins are not only good natural pigments, but also have very good biological activity. The physiological effects of European bilberry anthocyanins are mainly reflected in the improvement of vision and the protection of blood vessels. Cranberry anthocyanins have the obvious effect of inhibiting gynecological inflammation. In the United States and Europe, it is used as a health product for the prevention and treatment of gynecological inflammatory diseases that women can take for a long time. Mulberry anthocyanins have the functions of anti-oxidation, anti-inflammation, anti-cancer, and protection of blood vessels and nerves. Black rice anthocyanins can reduce the incidence of coronary heart disea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07H17/065C07H1/08A61P9/10A61P27/02A61P35/00A61P39/06
Inventor 魏有良范建礼
Owner 魏有良
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